Articulating arm



FIG. 1 is a perspective view of an articulating arm showing my new design;

FIG. 2 is a top plan view;

FIG. 3 is a bottom plan view;

FIG. 4 is a left side elevational view; and,

FIG. 5 is a right side elevation view thereof.

The conical shaped element disposed in FIGS. 1, 2, 4 and 5 shown in broken line is for illustrative purposes only and form no part of the claimed design. 

The ornamental design for an articulating arm, as shown. 